Ignition safety interlock

Details Ignition safety interlock Ignition safety interlock

1997-08-29

1999-01-19

Barrett, Suzanne Dino

Locks

Special application

For automotive vehicles

70248, 70252, B60R 2506

Patent

active

058603034

ABSTRACT:
A cable (52) operated ignition safety interlock assembly (50) for an automobile having an ignition switch (16) and an automatic transmission having a gear selector lever (14). The gear selector lever (14) includes a detent (20) manually moveable between a Home position, associated with the Park position of the gear selector lever (14), and a plurality of displaced positions associated with each of the drive positions of the gear selector lever (14). An interlock (50) restrains the ignition switch (16) in its Run position until the gear selector lever (14) is moved to its Park position to remind the driver that the transmission is not safety engaged in the Park condition. The interlock (50) includes a cable (52) having a first end (56) operatively connected to the detent (20) of the gear selector lever (14) and a second end (58) operatively engagable with the ignition switch (16) to restrain the ignition switch (16) in the Run position, and thus to prevent removal of the key from the ignition switch (16). The second end (58) of the cable (52) includes a plunger tip (70) which is moved to and remains in a fully extended condition, restraining the ignition switch (16) in the Run position, when the detent (20) is in any of the plurality of drive positions. The plunger tip (70) automatically moves to a retracted condition, disengaged from the ignition switch (16), when the detent (20) is returned to the Home position thereby allowing the ignition switch (16) to be moved to the Off position. When the gear selector lever (14) is moved to Park, the plunger tip (70) is retracted and disengaged from the ignition switch (16), permiting the ignition switch (16) to be turned Off and the key removed.

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